I really appreciate this question. I looked it up when I saw so many people mentioning it in the faint bfp forum. I then realized how many people on this app have no idea what it means and just throw the word around. So thank you for trying to educate yourself :) as corny as that may sound coming from a stranger lol

An evap shows up when test is dry and the urin is evaporating and may or may not have color. An indent shows up while test is still wet and is gray or white. Its basically the imprint of the test strip...